Even if the LG G4 is 'launched' at CES or MWC, it won't be on sale the next day!
There is NO confirmed launch date for the LG G4.
And once there is: really, dude - better wait for the LG G5

My opinion: buy a phone you like. One that is real. One you can try. One with a firmware you can live with. Do not wait for the next big thing. Do not decide on a device or OS based on what a future update allegedly brings...